ABOUT LAB
Introduction
BUILDING FORENSICS
Forensics is a scientific technique that analyzes an object profoundly and closely to investigate evidence and find out the truth about the problem of the object. Building forensics technology is an analysis method that uses various fourth-industrial technologies to obtain information to predict possible situations in buildings and check their safety conditions. The technology uses Unmanned Aerial Vehicles (UAV) and Light Detection and Ranging (LiDAR) to collect and acquire objective data on structures without subjective judgment intervention in hard-to-reach sites for humans. This laboratory, in particular, studies structural safety diagnosis using the building forensics technique.
The dynamic characteristics of the actual structure are extracted using the obtained photographed image data and image analysis techniques and evaluated based on the difference between the past data and the current analysis results.
1- Dynamic characteristic detection technology using UVA
2- Reverse engineering using UVA and 3D Laser scanners
The primary purpose is to compare the actual design and 3D BIM model based on data about the inside and outside of the structure obtained.
3- Infrared camera and a hyperspectral camera
The third is a technology that evaluates the state of the structure using an infrared camera and a hyperspectral camera. This laboratory is developing a technique that assesses the existence of structural defects and the degree of defects with artificial intelligence by using photographs of all sides of the building with an infrared camera and a hyperspectral camera.
NOVEL STRUCTURE
The construction field, which accounts for 39% of total industrial carbon emissions, also needs to specify a solution. About 60% of a building's carbon content is due to ground and underground structures and construction emissions. Various smart construction technologies are being developed to automate the construction industry. If technologies such as UVA, modulators, and BIM are applied and activated in construction technology, more than 47% of the construction process is expected to be automated.
To solve these problems, this laboratory proposed developing NOVEL Construction, a modular construction that integrates future steel structure construction technologies. NOVEL Construction presented the possibility of future construction technology using the steel structure industry by solving five challenges. The meaning of each letter of NOVEL is as follows: ‘Noise free’, ‘carbOn free’, ‘Vibration free’, ‘fire rEsistance’, and ‘in-site Labor free’.
First, the iFLASH System, which is thinner and lighter than the existing synthetic deck slab and has excellent fire and vibration resistance. It is applied as the floor system of NOVEL Construction. Due to dry assembly, the iFLASH System can significantly reduce time and cost. Also, recycling polymer and steel plates can reduce construction waste and carbon emissions.
1- iFlash System
2- Buckling Restrained Brace
Second, the buckling restrained brace (BRB) is applied to the NOVEL Construction to improve earthquake resistance. Polymer, a lightweight filler with high ductility, was used as a filler[hb1] for the NOVEL BRB, which can also save time and reduce carbon [hb2] emissions.
Third, the HAT joint is selected as an optimal joint for the NOVEL Construction. The HAT joint is a hemispherical column-pile joint that transmits only axial force to the lower part and has a more advantageous load transmission path than the conventional joint where the bending moment occurs.
3- HAT Joint
The above technologies have solved five challenges, and the specific issues are as follows: Noise resolution(N), an advantage of existing modulators, achieved carbon neutrality(O) through steel structure-based module design, and reduced carbon emissions by 76% compared to concrete structures utilizing recyclable materials such as Polymers. The challenge of horizontal and vertical vibration(V) was solved through the real vibration test of the iFLASH System and the seismic performance analysis of the NOVEL BRB. The iFLASH system, developed by applying the performance-based fire resistance design(E), secured economic efficiency, environmental friendliness, and ease of construction. This design solves the shortcomings of the existing fire resistance design. Finally, the in-site labor-free(L) performance was improved by applying NOVEL Construction, which is accessible to factory manufacture and transport.
